Use `parsePikadayDate` to parse due date string

What does this MR do?

Fix a bug where using new Date() to parse date string caused parsed date to have hours/minutes to offset the timezone instead of having 00:00, which caused date to show invalid value in certain timezones.

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [ ] Documentation created/updated
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• [ ] Conforms to the database guides
• ~~[ ] Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.~~
• [ ] Security reports checked/validated by reviewer

Closes #55266 (closed)